I've bought replacement door knobs that look like they need a small 1" bore, and screw directly onto the wood. Unfortunately my door has the larger 2" bores and the door knobs screw into each other.
I've looked around online and it seems like everyone wants to make their small bore bigger – I want to do the opposite. Is there any way to accomplish this or are the new replacement knobs I have useless unless you're drilling in a brand new piece of wood?
I just don't understand why this isn't all standardized.
Best Answer
I had a similar problem. I needed to go from a 2" hole to a 1" hole. I got a 2 1/4" hole saw and cut a hole through a piece of wood the same thickness as the door. I took the plug from the hole saw and glued it into the hole in the door. Sanded it, filled it in with a little wood putty and then drilled my 1" hole. Might be a little more work than you want to do but it did work.